Improvement in sewing-machines



WHEELER & CARPENTER.

' Sewing Machine.

Pate med Aug. 3, 1858.

Lllhogmyhar. Washington; n. (z

DARIUS WHEELER AND LUM'ANOARPENTER, OF OS\VEG(J, NEW YORK.

-l-MPRCVE'M ENT IN SEWING MACHINES.

Specification forming part of Letters Patent No. 21,100, dated August 3,1859.

To aZZ whom it may concern:

Be it knownthat we, DARIUS WHEELER andLUMAN CARPENTER, of Oswego, Stateof New York, have invented new and useful Improvements inSewing-Machines; and we do hereby declare that the following is a full'and' zlooper, cannot be taken again by the looper.

We will proceed to describe our improvements, and only-so much of themachine as may be necessary to explain fully our improvements, whichmaybe applied by any mechanic skilled in the arts to many sewingmachinesin use.

E E is the main frame of the machine, to which the operating part isattached, and upon which the cloth to be sewed is placed. This is madeof cast-iron or other metal. and may be attached to a table, and themachine may be operated by hand by means of a wheel or pulley; or may beconnected with a treadle attached to the table, and operated by thefoot.

The letters a a in the drawings represent a circular frame, of brass,iron, or other metal, the rim whereof is about one-half inch square,

which is fastened perpendicularly to the urn der side of the main frameof the machine at a port-ion of the arc of said circular frame which isleft flat for the space of about two inches, so as to fit to the saidmain frame, to which it is fastened by means of screws. The saidcircular frame is about four inches in diameter, and may be of anydiameter desired, according to the size of the machine and the speeddesired to be attained for propelling the needle A groove is made in theinside of this circular frame, the form of which is representedin'Figure 2 of the drawings, and in this groove the looper is made torevolve.

The letter 0 representsa section of the needle bar or carrier in whichthe needle is fastened, and the letter D represents the needle, with aneye in the lower end to receive the thread.

- There are two loopers, made of brass or other metal, represented bythe letters B B, which are fastened to the two arms attached to theshaft G by collars and set-screws, as shown in Fig. 7, and these armscarry said loopers around in the groove of the circular frame, and thepoint is turned up far enough to take the loop above the eye of theneedle, and as the loopers pass on in their revolution the loop isshortened and kept of sufficient tension, and before it is discharged atthe rear end of the looper the needle passes through the loop a secondtime, and thus forms the stitch, the loopers having a notch at the rearend for the purpose of having the needle pass down and through the loop.This notch is represented in 4 of the drawings. The forked end of thelooper is important for the purpose of facilitating the action of theneedle and to give it an opportunity to pass down and take the loop fromthe looper before it is discharged. Fig. 4 represents the inside surfaceof loopers B B withthe said forked ends, and the spots m on are theholes or countersinks in which the pins J J in Fig. 1 are placed. Thearms F F are fastened to the revolving shaft by means of collars and setscrews, and pass through slots in the springs H H, which are held totheir place by the pins I I or their equivalents, and move the loopersby means of the spring-pins J J, which are stationary in the spring andfits in corresponding holes or countersinks in the loopers. This shaft 0is made to revolve at therequired speed by means of a cam or anysimilar. device, which may readilybe adjusted by any mechanic. Thesprings H H are made of a thin plate of steel about one-half inch wide.It will be seen that the arms attached to the revolving shaft andpassing through the springs H H, upon which are fastened the spring-pinsJ J, and fitting into correspond ing countersinks in the loopers B B,will carry said loopers around in said groove of said circular frame,the motion of said loopers and of the needle being so graduated thatevery time the needle descends the looper will enter the loop as itforms on the needle, and as the needle again descends it will'passthrough and take the loop at the forks of the looper before the looperis discharged, or at about the instant of its discharge from the looper.

In order to have the loopers pass entirely through the loop, and stillto move continuously in a circle, we have arranged a cam, made of brassor other metal, and attached .the same to the under side of the plane ofthe main frame, which is represented in the drawings by letters K K,through which the needle passes in its descent, which cam raises thecession as each is raised and the other down,

so as. to move the looper or remain fixed to the looper until the loopcomes to that pin which is then raised by said cam, and the other pinremains fixed to the looper. This cam is so arranged with convexsurfaces as to A effect the above objects at the precise time as theloopers move round in the circle.

It will be seen that by our improvements the loop, upon its being takenby the looper, immediately is shortened and recedes out of the path ofthe point of the looper, so that it is impossible for it -to be againtaken by the looper.

In the drawings, Fig. 5 represents the surface of springs H H in Fig. 1flattened, showing the stationary spring-pins J J corresponding withholes or countersinks m m in Fig.

4. P P are slots through which the arms F F pass. The cam-plate overwhich the springs H H pass in their revolution is represented in Fig. 6by a flat view, and these springs pass over this cam a sufficientdistance apart to allow the loopers to pass between.

Fig. 7 represents a section of the shaft 0 in Fig. 1, to which thecollars 0 0 are attached, which carry the arms F F which move theloopers B B, as shown in Fig. 1. I I are the pins extending through armsF F, to prevent the springs H H in Fig. 1 moving high up on the arms,and to give tension.

"Weare aware of Blodget and Serows patent of January 14,1851, and do notintend to claim anything therein contained; and we are also familiarwith the claims of E. Harry Smith, now under examination at the PatentOffice, and make no claim to the broad principle claimed by him of arevolving looper having a continuous rotary movement and I passingentirely through a loop of the needle thread; but,

Having thus given a full description of our improvements, what we claimas our invention, and desire tosecure Letters Patent, is-

1. The combination of the notched looper with the needle, spring-pins.and cam-plate, substantially as described, whereby oneend of the loopertakes the loop and the other end discharges it upon the needle while thelooper is moving continuously in a circle.

2. The form of the looper, substantially as set forth, whereby as thelooper progresses through the loop the loop by the combined action ofthe needle and looper becomes shorter than when first taken, and isremoved entirely out of the path of the point of the looper at and afterits discharge, so that it cannot be taken again by the looper.

' DARIUS \VHEELER.

LUMAN CARPENTER. In presence of O. T. RICHARDSON, FRANKLIN EvERrs.

